Thank you, thank you very much Leif, I've seen you have a Buick in some forums. I've seen too, Cocker Tire and his answer was that he doesn't know what kind of tire I need. Now I'm happy after your answer but the Italian regulamentation about tires is very strictly to the original and you can't mount a different size. I've changed the papers today before immatricolate the car so I've my original size 6,00x22 ;-))) thanks again Seba